题目内容：

Small things can make a big difference to the environment. In our daily life, we can _____protect the environment.

① ride bikes or walk to school

② give out food to homeless people

③ use cloth bags instead of plastic bags

④ help the old people in the neighborhood

⑤turn off the lights when leaving a room

A.①③⑤ B.②③④ C.①④⑤